Tank Heaters; Limit Thermostats - Bunn TITAN DUAL Service & Repair Manual

COMPONENT ACCESS (cont)
REFILL VALVE (cont)
4. Remove the two 1/4"-20 screws securing the valve
to the component mounting bracket.
5. Using the two 1/4"-20 screws, install the new valve
to the component mounting bracket.
6. Securely fasten the water lines to the valve.
7. Refer to wiring diagrams when reconnecting the
wires.
8. Install access panels and covers and refer to Initial
Set-up for refill and operation.

TANK HEATERS

Limit Thermostats

Temperature Probe
FIG 5 TANK HEATERS, LIMIT THERMOSTATS,
TEMPERATURE PROBE
Location:
The tank heaters (Fig 5) are located inside the tank,
secured to the tank lid.
Test Procedures:
1. With a voltmeter, check voltage across the two
terminals on top of the tank heaters. Connect
brewer to the power source. The indication must
be 208 volts ac for three wire 120/208 volt models,
240 volts ac for three wire 120/240 volt models,
and 230 volts ac for 230/400 volt models (during
a heating cycle).
2. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #3.
RELEASED FOR PRODUCTION
Tank Heaters
DIR Num: 41747.0000
If voltage is not present as described, refer to the
Wiring Diagrams and check wiring harness. If harness
checks ok, replace control board.
3. Disconnect the wires from the tank heater terminals.
4. Check resistance value across tank heater terminals
and compare to chart.
If resistance is present as described, reconnect the
wires, the tank heater is ok.
If resistance is not present as described, replace the
tank heater.
NOTE- If any resistance is read between sheath and
either terminal, remove and inspect heater for cracks
in the sheath.
HEATER
4000W-208V
4000W-240V
TERMINAL TO SHEATH - INFINITE (OPEN)
Removal and Replacement:
1. Remove the top cover from the brewer.
2. Disconnect the wires from tank heater terminals.
3. Remove the four #8-32 nuts securing the tank
heater(s) to the tank lid assembly.
4. Remove tank heater(s) with gasket(s) and discard.
5. Install new tank heater(s) with new gasket(s) to
the tank lid assembly with the original nuts.
6. Reconnect the wires to the tank heater(s) terminals.
LIMIT THERMOSTATS
Location:
The limit thermostats
top cover on the tank lid assembly.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the wires from the limit thermostat.
3. With an ohmmeter, check for continuity across
the limit thermostat terminals.
Page 22
12, December 2018
RESISTANCE
11.0
14.47
(Fig 5) are located under the
41747 112608